diff options
Diffstat (limited to 'tools/perf/util/trace-event-info.c')
| -rw-r--r-- | tools/perf/util/trace-event-info.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c index eb72716017ac..22245986e59e 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -341,20 +341,14 @@ out: static int record_proc_kallsyms(void) { - unsigned int size; - const char *path = "/proc/kallsyms"; - struct stat st; - int ret, err = 0; - - ret = stat(path, &st); - if (ret < 0) { - /* not found */ - size = 0; - if (write(output_fd, &size, 4) != 4) - err = -EIO; - return err; - } - return record_file(path, 4); + unsigned long long size = 0; + /* + * Just to keep older perf.data file parsers happy, record a zero + * sized kallsyms file, i.e. do the same thing that was done when + * /proc/kallsyms (or something specified via --kallsyms, in a + * different path) couldn't be read. + */ + return write(output_fd, &size, 4) != 4 ? -EIO : 0; } static int record_ftrace_printk(void) |